Silicone gel dressing for rapid absorption of wound exudate

Abstract

The utility model discloses a silicon gel dressing of fast absorption wound exudate relates to dressing technical field. Its technical scheme is: including the substrate layer, the core layer, the silicon gel layer and the release film layer that set gradually, be provided with the opening on the silicon gel layer, the core layer sets up at the opening of silicon gel layer and the edge of core layer is bonded with the edge of opening, makes the core layer by the opening of silicon gel layer exposes, the core layer and the part of silicon gel layer that stretches out the core layer all are bonded on the substrate layer, be provided with a plurality of through -holes on the silicon gel layer. The utility model provides the silicon gel dressing of fast absorption wound exudate, realizes the efficient absorption wound exudate of core layer, and the porous structure of silicon gel layer has the ability of ventilative dampness, reduces skin impregnation and the allergic phenomenon, promotes the paste stability and pasting comfort of dressing, and simple structure design is suitable for large -scale production.

Description

Technical Field

[0001] This utility model relates to the field of dressing technology, specifically to a silicone gel dressing that rapidly absorbs wound exudate. Background Technology

[0002] In clinical medicine, routine wound care, and chronic disease wound repair, wound dressings are core medical consumables that protect wounds, isolate external bacteria, absorb wound exudate, and promote wound healing. Compared to traditional gauze and ordinary foam dressings, silicone gel dressings, with their core advantages of being non-toxic and hypoallergenic due to their organic silicone material, excellent skin adhesion, painless removal, and reapplied properties, are widely used in the care of various wounds such as pressure ulcers, burns, postoperative wounds, and chronic ulcers, and are currently the mainstream product for medical wound care.

[0003] During wound healing, tissue exudate is continuously produced. A moderate amount of exudate can maintain a moist healing environment, but excessive exudate buildup can breed bacteria, soften the surrounding healthy skin, and cause maceration, redness, swelling, allergies, and even secondary ulceration. Therefore, the dressing's ability to rapidly absorb exudate, its breathability and moisture-wicking properties, and its stability are key indicators of dressing quality. Currently, most mainstream silicone gel dressings on the market adopt a composite structure of "silicone gel full-coverage core." While this overall structure ensures the dressing's adhesion and fit, it has revealed many inherent defects in actual clinical use.

[0004] Firstly, the exudate absorption efficiency is low. The core layer of traditional silicone gel dressings is completely covered by a solid silicone gel layer. The silicone gel material itself has dense and waterproof barrier properties, so the tissue fluid exuded from the wound cannot directly contact the core layer. It can only slowly seep through the gaps at the edges of the silicone gel layer, which greatly reduces the exudate absorption rate and efficiency of the core layer. This results in a large amount of exudate accumulating on the wound surface and not being able to drain in time. This not only disrupts the balance of the wound's moist healing environment, but also significantly increases the risk of wound infection and suppuration, seriously delaying the wound healing process. It is especially unsuitable for acute wounds and chronic ulcers with large amounts of exudate.

[0005] Secondly, poor breathability can easily lead to skin maceration and allergies. To ensure adhesion, existing silicone gel layers mostly adopt a solid, non-porous structure, completely sealing the skin around the wound. Human skin continuously secretes sweat and trace metabolic secretions. A solid silicone gel layer cannot allow for breathability and moisture wicking, causing sweat and secretions to accumulate between the silicone gel layer and the skin, resulting in a persistently damp and hot environment. Prolonged use can easily lead to problems such as skin whitening, maceration, itching, and allergies. Simultaneously, the damp environment reduces the adhesion of the silicone gel layer, causing the dressing edges to curl, peel, and fall off. This not only compromises wound protection but also necessitates frequent dressing changes, increasing the workload for medical staff and the cost of patient care.

[0006] Third, existing improvement solutions have limitations. Currently, a small number of improved silicone gel dressings optimize exudate absorption by increasing the pore size of the silicone gel layer and reducing the silicone gel coverage area on the core layer surface. However, such improvements only solve the problem of localized exudate penetration and do not optimize the overall breathability structure of the silicone gel layer. Therefore, they still cannot solve the core problems of sweat accumulation on the surrounding skin and dressing peeling off.

[0007] In summary, existing silicone gel dressings generally suffer from drawbacks such as slow exudate absorption, weak breathability and moisture wicking, easy to cause skin maceration and allergies, poor adhesion stability, and limited applicability to various scenarios. They are unable to meet the needs of clinical use for high-exudate wounds and long-term wound care. Therefore, there is an urgent need to develop a new type of silicone gel dressing that combines rapid exudate absorption, high-efficiency breathability, low allergy and comfort, and stable adhesion. Utility Model Content

[0008] The technical problem this invention aims to solve is: Existing silicone gel dressings suffer from several shortcomings, including the silicone gel covering the core layer hindering exudate absorption, the solid, non-porous silicone gel layer causing edge lifting after skin sweat soaking into the silicone gel layer, and the tendency for allergies after application. This invention provides a silicone gel dressing that rapidly absorbs wound exudate, achieving efficient absorption of wound exudate by the core layer. Simultaneously, the porous structure of the silicone gel layer provides breathability and moisture wicking, reducing skin soaking and allergic reactions, improving the dressing's adhesion stability and application comfort. Furthermore, the simple structural design makes it suitable for mass production.

[0009] The technical solution of this utility model is as follows: A silicone gel dressing that rapidly absorbs wound exudate comprises a base layer, a core layer, a silicone gel layer, and a release film layer arranged sequentially. The silicone gel layer has an opening, and the core layer is positioned at the opening of the silicone gel layer with its edge bonded to the edge of the opening, allowing the core layer to protrude through the opening of the silicone gel layer. Both the core layer and the portion of the silicone gel layer extending beyond the core layer are bonded to the base layer. The silicone gel layer has several through-holes.

[0010] Preferably, the edge of the core layer is bonded to the edge of the opening with hot melt adhesive, and the portions of the core layer and the silicone gel layer extending out of the core layer are respectively bonded to the base layer with hot melt adhesive.

[0011] Preferably, the core layer is made of polyurethane foam with a thickness of 0.5-10 mm.

[0012] Preferably, the core layer is square, circular, or elliptical, with a side length or diameter of 30-200 mm.

[0013] Preferably, the silicone gel layer is made of silicone pressure-sensitive adhesive; the side length of the silicone gel layer is 50-300mm, the bonding width between the edge of the core layer and the opening edge of the silicone gel layer is 0.5-5mm; and the basis weight of the silicone gel layer is 50-250gsm.

[0014] Preferably, the base layer is made of polyurethane.

[0015] Preferably, the vias are distributed in a rectangular array on the silica gel layer, with a via diameter of 0.5-3 mm and a center-to-center distance of 1-10 mm between adjacent vias.

[0016] Compared with the prior art, this utility model has the following advantages: 1. This utility model exposes the dressing layer directly from the opening of the silicone gel layer, with only the edges bonded to the silicone gel layer. This eliminates the barrier of the silicone gel layer to wound exudate, allowing the exudate to directly and quickly contact the dressing layer and be absorbed. This significantly improves the exudate absorption rate and amount, effectively prevents exudate from accumulating on the wound surface, reduces the risk of wound infection and suppuration, and is suitable for the care needs of high-exudate wounds.

[0017] 2. The silicone gel layer of this utility model is provided with rectangular array-distributed through holes to form a good air-permeable channel, which can quickly drain the sweat and metabolic secretions secreted by the skin around the wound, avoid the skin being in a humid and hot environment for a long time, reduce the incidence of skin whitening, maceration, itching and allergies from the root, and improve the safety of long-term application.

[0018] 3. This utility model uses a perforated structure to create a micro-breathable circulation between the silicone gel layer and the skin, preventing sweat accumulation from weakening the adhesion and significantly improving the adhesive performance of the dressing; at the same time, the perforations allow the silicone gel layer to be stressed more evenly, resulting in a tight fit after application, with edges less prone to lifting, peeling, or falling off, reducing the frequency of dressing changes and lowering care costs.

[0019] 4. The silicone gel layer of this invention is only distributed around the core layer, so the pressure is evenly distributed after application, without local pressure or indentation; the silicone gel material is hypoallergenic, easy to peel off, and painless to remove, reducing secondary damage to the skin and improving patient comfort.

[0020] 5. The dressing of this utility model adopts a simple composite structure of a base layer, a core layer, a silicone gel layer, and a release film layer. The bonding process is mature and easy to operate. The silicone gel layer is only set around the core layer, which reduces the amount of silicone gel material used, lowers production costs, and is suitable for industrial-scale production and promotion. Attached Figure Description

[0021] Figure 1 This is an exploded view of the structure of the silicone gel dressing that rapidly absorbs wound exudate according to this invention.

[0022] Figure 2 This is an exploded view of the structure of the silicone gel dressing for rapid absorption of wound exudate of this utility model (release film layer not shown).

[0023] Figure 3This is an exploded side view of the structure of the silicone gel dressing for rapid absorption of wound exudate according to this invention (release film layer not shown).

[0024] Figure 4 This is a top view of the silicone gel dressing for rapid absorption of wound exudate according to this invention (release film layer not shown).

[0025] In the figure, 1 is the base layer; 2 is the core layer; 3 is the silicone gel layer; 301 is the opening; 302 is the through hole; and 4 is the release film layer. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model.

[0027] Example 1 like Figure 1-4 As shown, this embodiment provides a silicone gel dressing that rapidly absorbs wound exudate, comprising a base layer 1, a core layer 2, a silicone gel layer 3 made of silicone pressure-sensitive adhesive, and a release film layer 4 arranged sequentially. The core layer 2 is made of polyurethane sponge, a material with strong hydrophilicity, rapid water absorption, and the ability to gel appropriately upon contact with exudate. It can quickly absorb and lock in large amounts of wound exudate, reducing backflow. It also exhibits good biocompatibility and low allergenicity, making it suitable for various types of wounds with medium to high exudate. The core layer 2 has a thickness of 0.5-10 mm and is square, circular, or elliptical in shape, with a side length or diameter of 30-200 mm.

[0028] An opening 301 is provided on the silicone gel layer 3. The core layer 2 is placed at the opening 301 of the silicone gel layer 3, and the edge of the core layer 2 is circumferentially bonded to the edge of the opening 301 with hot melt adhesive, so that the core layer 2 is exposed through the opening 301 of the silicone gel layer 3. The bonding width is 0.5-5mm to ensure edge sealing, no leakage, and no delamination. The side length of the silicone gel layer 3 is 50-300mm, and the basis weight is 50-250gsm. The silicone gel layer 3 has a rectangular array of through holes 302, the diameter of which is 0.5-3mm, and the center-to-center distance between adjacent through holes 302 is 1-10mm. The through holes 302 are evenly distributed, forming a stable air-permeable channel, which can balance adhesion and air permeability.

[0029] The base layer 1 is made of polyurethane and serves as a support layer for the overall dressing, preventing leakage of wound exudate.

[0030] Release film 4 is bonded to the surface of silicone gel layer 3 with silicone gel, protecting the adhesive side of silicone gel layer 3 before use to prevent it from being contaminated and to ensure its adhesiveness; it can be peeled off directly during use, and silicone gel layer 3 can be directly applied to the healthy skin around the wound.

[0031] The dressing in this embodiment is formed by hot-melt adhesive hot-pressing. The bonding temperature is controlled at 80-200℃, the bonding pressure is controlled at 0.1-0.5MPa, and the bonding time is controlled at 5-15s. After bonding, each layer is firmly bonded, without bubbles, curling edges, or delamination. The dressing is soft, elastic, and can naturally conform to the skin's movements.

[0032] In this embodiment, the dressing, except at the edges, is not covered by the silicone gel layer 3, allowing direct exposure to the wound surface. This directly eliminates the barrier effect of silicone gel on wound exudate, enabling wound exudate to quickly penetrate into the dressing layer 2, fully utilizing its high absorption and liquid-locking properties, and reducing the accumulation of exudate on the wound surface. The through-holes 302 in the silicone gel layer 3 allow for breathability and moisture wicking, quickly expelling sweat and secretions from the skin around the wound, preventing the skin from being in a moist environment for extended periods, and reducing skin maceration and allergies at the source. The rectangular array of through-holes 302 creates a micro-breathing circulation between the silicone gel layer 3 and the skin, preventing sweat from accumulating between the silicone gel layer 3 and the skin and reducing the adhesion of the silicone gel layer 3, significantly improving the dressing's adhesive stability and extending its adhesion time. At the same time, the through-holes 302 make the silicone gel layer 3 more evenly stressed, resulting in a consistent pressure distribution on the skin after application, without localized pressure marks, thus improving comfort. In addition, the silicone gel layer 3 is only distributed around the core layer 2, which not only ensures that the dressing adheres to the skin with low sensitivity and easy peeling, but also reduces the amount of silicone gel used and lowers production costs. Furthermore, the hot melt adhesive bonding method ensures the strong connection between the silicone gel layer 3 and the core layer 2, avoids delamination during use, and improves the overall structural stability of the dressing.

Claims

1. A silicone gel dressing that rapidly absorbs wound exudate, characterized in that, The material includes a base layer (1), a core layer (2), a silicone gel layer (3), and a release film layer (4) arranged sequentially. An opening (301) is provided on the silicone gel layer (3). The core layer (2) is located at the opening (301) of the silicone gel layer (3), and the edge of the core layer (2) is bonded to the edge of the opening (301), so that the core layer (2) is exposed through the opening (301) of the silicone gel layer (3). The core layer (2) and the part of the silicone gel layer (3) extending out of the core layer (2) are both bonded to the base layer (1). Several through holes (302) are provided on the silicone gel layer (3).

2. The silicone gel dressing for rapid absorption of wound exudate as described in claim 1, characterized in that, The edge of the core layer (2) is bonded to the edge of the opening (301) by hot melt adhesive, and the parts of the core layer (2) and the silicone gel layer (3) extending out of the core layer (2) are respectively bonded to the base layer (1) by hot melt adhesive.

3. The silicone gel dressing for rapid absorption of wound exudate as described in claim 1, characterized in that, The core layer (2) is made of polyurethane foam with a thickness of 0.5-10 mm.

4. The silicone gel dressing for rapid absorption of wound exudate as described in claim 3, characterized in that, The core layer (2) is square, circular or elliptical, with a side length or diameter of 30-200 mm.

5. The silicone gel dressing for rapid absorption of wound exudate as described in claim 1, characterized in that, The silicone gel layer (3) is made of silicone pressure-sensitive adhesive; the side length of the silicone gel layer (3) is 50-300mm, the bonding width between the edge of the core layer (2) and the edge of the opening (301) of the silicone gel layer (3) is 0.5-5mm; the basis weight of the silicone gel layer (3) is 50-250gsm.

6. The silicone gel dressing for rapid absorption of wound exudate as described in claim 1, characterized in that, The base layer (1) is made of polyurethane.

7. The silicone gel dressing for rapid absorption of wound exudate as described in claim 1, characterized in that, The through holes (302) are distributed in a rectangular array on the silicone gel layer (3). The diameter of the through holes (302) is 0.5-3mm, and the center-to-center distance between adjacent through holes (302) is 1-10mm.

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